Chevrolet Citation Parking Light Bulb Size

The Chevrolet Citation parking light requires bulb size 2057NA, 1157NA, or 1034NA depending on the specific version of the vehicle. Data for the lighting components covers the range from 1980 to 1983.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1983	2057NA
1982	1157NA
1980-1981	1034NA

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Brighter variant of 1157. 12V, 26.9W/8W.	2057NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W.	1157NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Variant of 1157. 12V, 21/5W.	1034NA

Other Locations

Additional Notes

All three bulb types specified for the Chevrolet Citation parking lights across 1980-1983 share the BAY15d bayonet base, a double-contact offset-pin base design that physically locks the bulb into the socket through a twist-and-lock motion.
The BAY15d base is common to the 2057NA, 1157NA, and 1034NA, meaning all three bulbs share the same socket interface despite differing in wattage and light output.
All bulbs across the 1980-1983 model years carry the "NA" suffix, which denotes natural amber glass rather than a clear envelope with a separate amber lens or filter.
Each bulb is a dual-filament type, meaning a single unit serves two independent functions, typically a lower-wattage filament for steady parking illumination and a higher-wattage filament for a brighter signal or running function.
The 2057NA, fitted to the 1983 Citation, operates at 26.9W on its high filament, making it the highest-wattage parking light bulb in this specification set. The 1157NA and 1034NA both operate at 21W on their high filaments.
The 1034NA, used on the 1980-1981 Citation, is described as a variant of the 1157NA and shares the same 21W/5W wattage rating, indicating functional equivalence despite the different ANSI designation.
The 2057NA is described as a brighter variant of the 1157NA. Although both share the BAY15d base and the same low-filament wattage of approximately 5W-8W, the 2057NA draws more power on its high filament, which affects compatibility when substituting one for the other.
Because the 2057NA draws 26.9W versus the 1157NA's 21W on the high filament, using a 1157NA in a 1983 Citation socket designed for the 2057NA would result in reduced output, while the reverse substitution could place higher-than-intended current draw on the circuit.
All bulbs in this specification are rated at 12V, consistent with the standard 12-volt electrical systems used in passenger vehicles of this period.
All three bulb types conform to ANSI standards recognized in both the United States and Canada, placing them within a regulated framework for bulb base dimensions, voltage, and filament positioning.